Is CVE-2026-39962 in the CISA KEV catalog?

No. CVE-2026-39962 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-39962?

CVE-2026-39962 has a CVSS v3 base score of 9.6 (CRITICAL).

What is the EPSS score for CVE-2026-39962?

CVE-2026-39962 has an EPSS score of 0.34% (27th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-39962?

Upgrade misp to 2.5.36 or later.

CVE & CISA-KEV Catalog

CVE-2026-39962

CRITICAL

9.6

CVSS v3

NVD

Description

MISP is an open source threat intelligence and sharing platform. Prior to 2.5.36, improper neutralization of special elements in an LDAP query in ApacheAuthenticate.php allows LDAP injection via an unsanitized username value when ApacheAuthenticate.apacheEnv is configured to use a user-controlled server variable instead of REMOTE_USER (such as in certain proxy setups). An attacker able to control that value can manipulate the LDAP search filter and potentially bypass authentication constraints or cause unauthorized LDAP queries. This vulnerability is fixed in 2.5.36.

CWE-90

How to fix

Remediation Available

mispNVD

Affected:< 2.5.36Fixed in:2.5.36CVE-2026-39962derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Exploit Intelligence

0.34%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Patch2

Vendor Advisory1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-90 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-9299	Critical	9.8	97%	-	-
CVE-2017-14596	Critical	9.8	6.5%	-	-
CVE-2016-8750	Medium	6.5	5.3%	-	Fix
CVE-2021-43350	Critical	9.8	4.4%	-	Fix
CVE-2017-4927	High	7.5	2.3%	-	Fix
CVE-2024-27310	Medium	5.3	2.3%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-22.